Abstract: A range finder adapted for finding the object distance of a subject having a specific height includes a shell unit, an objective lens assembly, a magnifying unit having multiple selectable magnification ratios, and a range finding unit. The range finding unit includes a scale, a pointer, and a mark. The object distance of the subject is known by comparing the scale and the pointer in an imaging plane when an end of an image of the specific height of the subject formed on the imaging plane is aligned with the mark.

Abstract: A sight device with a light-extinction structure includes a zooming outer tube, an inner tube and a zooming group. The inner tube is disposed coaxially in the zooming outer tube, and the zooming group is composed by a plurality of lenses, and the zooming group is disposed inside the inner tube and is controlled by the zooming outer tube, and thus the lenses are allowed to move inside the inner tube for adapting a focal length of the zooming group.

Abstract: An optical sight includes an outer barrel unit, an objective lens unit, an ocular lens unit, a magnification unit, and an illumination unit. The outer barrel unit extends about an axis and has a front end and a rear end. The objective lens unit is mounted to the front end of the outer barrel unit and has a first optical axis. The ocular lens unit is mounted to the rear end of the outer barrel unit. The magnification unit is disposed in and on the outer barrel unit between the objective lens unit and the ocular lens unit, and has a second optical axis. The illumination unit is disposed on the magnification unit, and includes a light source spaced apart from the second optical axis, and a reflective element for projecting emitted light, which is emitted from the light source, onto the objective lens unit.

Abstract: A laser sight is disclosed, including a housing which defines a first central axis, an objective module, an eyepiece, an erecting system, and an adjusting member. The objective module is fixed to a first end of the housing, and the eyepiece is fixed to a second end of the housing, opposite to the first end. The erecting system is movably disposed between the objective module and the eyepiece and comprises a laser rangefinder defining a second central axis. The adjusting member is movably disposed on the housing and connected to the erecting system. During windage and elevation adjustments, the adjusting member moves with respect to the housing and impels the laser rangefinder, such that the first and second axes form an included angle.

Abstract: The electronic sight includes a base, an optical window, a point light source, a photomask and a low-reflective layer. The optical window is disposed on a first end of the base. The point light source, disposed on a second end of the base, provides a lightbeam. The photomask is disposed between the point light source and the optical window, and the low-reflective layer is formed thereon. The lightbeam passes through the photomask along a first direction, hits the optical window, and is reflected toward a second direction by the optical window. The method for manufacturing the electronic sight includes: providing a base; providing an optical window disposed on a first end of the base; providing a point light source disposed on a second end of the base; providing a photomask; forming a low-reflective layer on the photomask; and positioning the photomask between the point light source and the optical window.

Abstract: An optical sight includes an outer barrel unit, an objective lens unit, an ocular lens unit, a magnification unit, and an illumination unit. The outer barrel unit extends about an axis and has a front end and a rear end. The objective lens unit is mounted to the front end of the outer barrel unit and has a first optical axis. The ocular lens unit is mounted to the rear end of the outer barrel unit. The magnification unit is disposed in and on the outer barrel unit between the objective lens unit and the ocular lens unit, and has a second optical axis. The illumination unit is disposed on the magnification unit, and includes a light source spaced apart from the second optical axis, and a reflective element for projecting emitted light, which is emitted from the light source, onto the objective lens unit.

Abstract: The electronic sight includes a base, an optical window, a point light source, a photomask and a low-reflective layer. The optical window is disposed on a first end of the base. The point light source, disposed on a second end of the base, provides a lightbeam. The photomask is disposed between the point light source and the optical window, and the low-reflective layer is formed thereon. The lightbeam passes through the photomask along a first direction, hits the optical window, and is reflected toward a second direction by the optical window. The method for manufacturing the electronic sight includes: providing a base; providing an optical window disposed on a first end of the base; providing a point light source disposed on a second end of the base; providing a photomask; forming a low-reflective layer on the photomask; and positioning the photomask between the point light source and the optical window.

Abstract: A laser sight is disclosed, including a housing which defines a first central axis, an objective module, an eyepiece, an erecting system, and an adjusting member. The objective module is fixed to a first end of the housing, and the eyepiece is fixed to a second end of the housing, opposite to the first end. The erecting system is movably disposed between the objective module and the eyepiece and comprises a laser rangefinder defining a second central axis. The adjusting member is movably disposed on the housing and connected to the erecting system. During windage and elevation adjustments, the adjusting member moves with respect to the housing and impels the laser rangefinder, such that the first and second axes form an included angle.

Abstract: A digital telescopic sight includes an objective lens group (202), a light collecting lens (204), an erecting lens group (206), an eyepiece lens group (212), a semi-reflecting mirror (208) and an image sensor (210). The incident exterior light rays are sequentially transmitted through the objective lens group, the light collecting lens and the erecting lens group, and then incident onto the semi-reflecting mirror. The semi-reflecting mirror reflects a portion of the light rays onto the image sensor, and transmits the remaining primary light rays to the eyepiece lens group for enabling the user to view the image. The image sensor receives the reflected portion of the light rays, converts it into an electrical signal, and finally transmits the electrical signal to a digital signal processor for further image signal processing.

Abstract: A mechanism for preventing point of impact shift inside a variable focus system. The mechanism for preventing point of impact shift comprises a first lens chamber, a second lens chamber, a first arresting spring and a second arresting spring. The first and the second lens chamber are disposed within an internal sleeve but separated from each other by a distance. The first and the second lens chamber can slide within the internal sleeve and each lens chamber has an individual groove. The first arresting spring is disposed inside the groove in the first lens chamber such that the first arresting spring is elastically deformed between the internal sleeve and the first lens chamber. The second arresting spring is disposed inside the groove in the second lens chamber such that the second arresting spring is elastically deformed between the internal sleeve and the second lens chamber.

Abstract: The present invention provides an optical sight with rangefinder and assembly method thereof. The optical sight comprises an erector lens unit, a photoelectric rangefinding unit, a barrel, an objective lens unit, a plurality of adjusting elements, a power supply unit and an eyepiece lens unit disposed on the barrel. The photoelectric rangefinding unit includes a laser emitter, a laser receiver and a range indicator. A plurality of openings are formed on sidewall of the barrel corresponding to the positions of the laser emitter, laser receiver and range indicator for conducting the cavity to outside the barrel.